Anchoring scaffolding to a brick wall is one of the most critical steps in setting up a safe working platform. Done incorrectly, it can lead to scaffold collapse — a serious risk to you, your family, and anyone nearby. In New Zealand, scaffolding safety is governed by WorkSafe NZ guidelines, and for anything beyond very basic low-level work, a licensed scaffolder is strongly recommended.
Why Wall Anchoring Matters
Scaffolding ties — also called wall anchors or reveal ties — stop the scaffold from tipping away from or into the building. Without adequate ties, even a modest gust of wind or an uneven load can cause the entire structure to shift or collapse. Brick walls present specific challenges because the strength of the anchor depends heavily on the condition of the bricks, the mortar, and the type of fixing used.
Understanding NZ Scaffolding Regulations
In New Zealand, scaffolding over 5 metres in height must be designed, erected, and dismantled by a licensed scaffolder under the Health and Safety at Work Act 2015. WorkSafe NZ publishes detailed guidance on scaffolding requirements, including their Good Practice Guidelines for Scaffolding in New Zealand. Even for lower scaffolding, you have a legal duty to ensure the structure is safe for anyone who might use it or be near it.
If your project requires a building consent, check with your local council — some exterior work triggers consent requirements under the NZ Building Code.
Types of Wall Anchors for Brick
Choosing the right anchor for a brick wall is essential. The main options used in NZ scaffolding are:
- Reveal ties (window/door reveal ties): A steel tube wedged across a window or door opening, with a coupler and tube running out to the scaffold. These avoid drilling into the wall entirely and are often preferred for heritage or older brick buildings.
- Through-wall anchors (bolt anchors): A bolt passed through a hole drilled in the mortar joint or brick, with a plate on the inside. Requires drilling and is more permanent.
- Resin/chemical anchors: A threaded rod set into a drilled hole using a two-part resin. Suitable where high load capacity is needed, but requires the correct resin for masonry and proper hole preparation.
- Expansion anchors (sleeve anchors): Mechanical anchors that expand inside a drilled hole. Must be rated for masonry and installed per the manufacturer's specifications.
Always drill into mortar joints where possible rather than through the face of bricks — mortar is easier to repair and reduces the risk of cracking or spalling the brick.
Key Steps for Anchoring Safely
1. Assess the Wall Condition
Before drilling or fixing anything, inspect the brickwork. Old, crumbling, or poorly pointed mortar significantly reduces anchor strength. If the wall is in poor condition, consult a qualified tradesperson before proceeding.
2. Use the Correct Fixings
Only use scaffold ties and anchors rated for the loads involved. Check the manufacturer's load ratings and ensure they match your scaffold design. Hardware suppliers such as Bunnings and Mitre 10 stock masonry anchors, but for scaffolding-specific hardware, a specialist scaffolding supplier is the better choice.
3. Follow Tie Spacing Guidelines
As a general guide from industry practice, ties are typically required:
| Scaffold Height | Maximum Tie Spacing (vertical) | Maximum Tie Spacing (horizontal) |
|---|---|---|
| Up to 5 m | Every 4 m | Every 6 m |
| Over 5 m | Every 4 m | Every 6 m |
Note: These are general guidelines only. Always refer to your scaffold supplier's documentation and WorkSafe guidance for your specific setup.
4. Torque and Test Each Anchor
Once installed, each anchor should be tested by applying a load in the direction it will be stressed. If an anchor pulls out or feels loose, do not use it — re-drill in a new location or use a reveal tie instead.
5. Inspect Regularly
Check all ties at the start of each working day and after any high winds or heavy rain. Brick mortar can soften in wet conditions, reducing anchor holding power.
Safety Notes
- Never exceed the scaffold's rated load. Overloading is a leading cause of scaffold failure.
- Wear appropriate PPE, including a hard hat and safety footwear, when erecting or working on scaffolding.
- Keep the area below the scaffold clear of people while erecting or dismantling.
- WorkSafe NZ has free resources on working at height that are worth reading before you start.
- For information on healthy and safe homes more broadly, BRANZ is an excellent NZ research resource.
When to Call a Professional
For any scaffold over 5 metres, or if you are unsure about the condition of your brickwork, the anchor loads required, or how to set up ties correctly, hire a licensed scaffolder. This is not just best practice — in many situations it is a legal requirement under NZ law. A qualified scaffolder will assess your specific wall, select the right anchor type, and ensure the structure meets WorkSafe standards.
You can find licensed local scaffolders in your area on tradedirectory.co.nz.
